Distance measurement instrument

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a cross-sectional view of an optoelectronic distance measuring device which has a lighting unit and a light receiving unit constructed in accordance with the present invention;

FIG. 2 is a plan view of a beam forming optics with a four-zone optic; and

FIG. 3 is a schematic representation of several illumination patterns which change with the distance to the distance measuring device.